Re: Support Agreement (the “Support Agreement”), dated as of October 15, 2007, by and between Quest Resource Corporation (“Quest”) and the stockholders of Pinnacle Gas Resources, Inc. (“Pinnacle”) signatory hereto.

Xxxxxxx 00.0

Xxxxxxxx 0, 0000

XXX Merchant Banking Partners
0000 Xxxxxx xx xxx Xxxxx
Xxx Xxxxxxx, 00000 XX
Attention: Xxxxx Xxxxxxxx

Credit Suisse Private Equity
Eleven Madison Avenue, 16^th Floor
New York, New York 10010
Attention: Xxxxxx Xxxxxxx

Re: Support Agreement (the “Support Agreement”), dated as of October 15, 2007, by and between Quest Resource Corporation (“Quest”) and the stockholders of Pinnacle Gas Resources, Inc. (“Pinnacle”) signatory hereto.

Ladies and Gentlemen:

     In connection with the execution of the Amended and Restated Agreement and Plan of Merger, dated as of the date hereof, by and among Quest, Pinnacle and Quest MergerSub, Inc. (the “Amended Merger Agreement”), the Support Agreement is hereby amended to provide that the term “Merger Agreement” as used therein shall mean the Amended Merger Agreement.

     Please evidence your agreement to the foregoing amendment by executing below in the space provided.

	QUEST RESOURCE CORPORATION
	By:	/s/ Xxxxx X. Xxxx
		Xxxxx X. Xxxx, Chief Executive Officer

AGREED AND ACCEPTED, as of February 4, 2008.

DLJ MERCHANT BANKING PARTNERS III, L.P.
By:		DLJ Merchant Banking III, Inc.,
		as Managing General Partner
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
DLJ Merchant Banking III, Inc., as Advisory
General Partner on behalf of DLJ OFFSHORE
PARTNERS III, C.V.
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
DLJ Merchant Banking III, Inc., as Advisory
General Partner on behalf of DLJ OFFSHORE
PARTNERS III-1, C.V. and as attorney-in-fact for
DLJ Merchant Banking III, L.P., as Associate
General Partner of DLJ OFFSHORE
PARTNERS III-1, C.V.
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
DLJ Merchant Banking III, Inc., as Advisory
General Partner on behalf of DLJ OFFSHORE
PARTNERS III-2, C.V. and as attorney-in-fact for
DLJ Merchant Banking III, L.P., as Associate
General Partner of DLJ OFFSHORE PARTNERS
III-2, C.V.
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President

MILLENNIUM PARTNERS II, L.P.
By:		DLJ Merchant Banking III, Inc.,
		as Managing General Partner
		By: /s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
MBP III PLAN INVESTORS, L.P.
By:		DLJ LBO Plans Management Corporation II,
		its General Partner
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
DLJ Merchant Banking III, LLC, as General Partner
of DLJ Merchant Banking III, L.P., and as attorney-
in-fact for DLJ Merchant Banking III, L.P., as
Managing Limited Partner for and on behalf of
DLJ MB PARTNERS III GMBH & CO. KG
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President
DLJ MB GmbH, as General Partner for and on
behalf of DLJ MB PARTNERS III GMBH &
CO. KG
By:		/s/ Xxxxxxx Xxxxxx
		Name: Xxxxxxx Xxxxxx
		Title: Vice President